We are putting in place a MPLS network to replace our current managed VPN for both data and voice traffic. From what I understand, our gateway of xxx.xxx.xxx.xxx will not change. We want to move offices over one at a time. What impact will this have when lets say 3 of our remote offices (A, B, and C) all point back to the same clan here in our headquarters. If we want voice traffic from office "A" to traverse across the new MPLS network, yet B and C are still on the managed VPN, how does this impact us? Is there a way to make this work? Or do we need to cut all 3 offices over to the MPLS simultaneously? Any light you could shed would be appreciated. Thanks,